WO2018076584A1 - Réfrigérateur - Google Patents

Réfrigérateur Download PDF

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Publication number
WO2018076584A1
WO2018076584A1 PCT/CN2017/074590 CN2017074590W WO2018076584A1 WO 2018076584 A1 WO2018076584 A1 WO 2018076584A1 CN 2017074590 W CN2017074590 W CN 2017074590W WO 2018076584 A1 WO2018076584 A1 WO 2018076584A1
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WO
WIPO (PCT)
Prior art keywords
evaporator
compartment
cooling
refrigerator
freezing
Prior art date
Application number
PCT/CN2017/074590
Other languages
English (en)
Chinese (zh)
Inventor
馆野恭也
丰岛昌志
Original Assignee
青岛海尔股份有限公司
海尔亚洲株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 青岛海尔股份有限公司, 海尔亚洲株式会社 filed Critical 青岛海尔股份有限公司
Priority to EP17864181.7A priority Critical patent/EP3531048A4/fr
Priority to US16/344,358 priority patent/US11150006B2/en
Publication of WO2018076584A1 publication Critical patent/WO2018076584A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/042—Air treating means within refrigerated spaces
    • F25D17/045—Air flow control arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
    • F25D17/062—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation in household refrigerators
    • F25D17/065—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation in household refrigerators with compartments at different temperatures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
    • F25D19/003—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors with respect to movable containers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/002—Defroster control
    • F25D21/004—Control mechanisms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/04—Preventing the formation of frost or condensate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/003—Arrangement or mounting of control or safety devices for movable devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2347/00—Details for preventing or removing deposits or corrosion
    • F25B2347/02—Details of defrosting cycles
    • F25B2347/021—Alternate defrosting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/04—Refrigeration circuit bypassing means
    • F25B2400/0409—Refrigeration circuit bypassing means for the evaporator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2511—Evaporator distribution valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/15—Power, e.g. by voltage or current
    • F25B2700/151—Power, e.g. by voltage or current of the compressor motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
    • F25D11/022—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures with two or more evaporators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2600/00—Control issues
    • F25D2600/06—Controlling according to a predetermined profile
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/02—Sensors detecting door opening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/12—Sensors measuring the inside temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/12—Sensors measuring the inside temperature
    • F25D2700/122—Sensors measuring the inside temperature of freezer compartments
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/14—Sensors measuring the temperature outside the refrigerator or freezer

Definitions

  • the invention relates to a refrigerator which stores and stores foods in a storage room, and more particularly relates to a refrigerator having a forced circulation evaporator and a direct cooling evaporator.
  • a refrigerator that forcibly circulates air cooled by an evaporator in a storage chamber (for example, Japanese Laid-Open Patent Publication No. 2011-58689 (pages 6-7, 2).
  • the evaporator is disposed inside the cooling chamber spaced apart from the storage compartment, and the air cooled by the evaporator is sent out by the fan and supplied to the storage compartment through the supply duct.
  • the storage compartment is usually divided into a plurality of storage compartments such as a refrigerating compartment and a freezing compartment, and the amount of cold air supplied to each storage compartment is controlled by opening and closing a damper or the like provided on the supply duct. Further, in order to melt the frost on the evaporator, heating is performed by an electric heater or the like, or shutdown defrosting, hot air defrosting, or the like is performed.
  • the refrigerator of the above-described conventional technology can be further improved from the viewpoint of reducing energy consumption, achieving further energy saving, and maintaining food quality.
  • the conventional circulation type refrigerator has the following problems. That is: the amount of frost on the evaporator is large, and the number of defrosting increases. When the frost is applied to the defrosting melt evaporator, the use of an electric heater or the like causes power consumption. Further, as the defrosting increases, the temperature in the storage compartment rises, and the refrigeration load increases, resulting in an increase in the amount of power consumption for cooling the storage compartment. Therefore, in order to achieve energy saving, it is necessary to prevent frosting on the evaporator to reduce the number of times of defrosting operation.
  • a conventional direct-cooling type refrigerator has less frosting on the evaporator and a lower drying degree in the storage chamber than the forced circulation type refrigerator.
  • problems such as difficulty in defrosting the evaporator.
  • the evaporator in which the evaporator is provided on the inner wall of the storage compartment or inside, if the temperature of the evaporator is raised in order to melt the frost, it is easy to raise the temperature in the storage chamber. Therefore, the cooling load after defrosting increases, and the amount of power consumption also increases.
  • an electric heater or the like is required to prevent the defrosting water from being frozen again in the storage chamber.
  • Such an electric heater or the like for preventing freezing not only consumes electric power, but also increases the cooling load and increases the amount of electric power consumption by cooling.
  • an object of the present invention is to provide a refrigerator which is excellent in energy saving, can suppress drying of a storage compartment, reduce the number of defrosting, and reduce the amount of power consumption.
  • an embodiment of the present invention provides a refrigerator having: a storage compartment divided into at least a refrigerating compartment and a freezing compartment; and a first evaporator disposed in the cooling compartment, the cooling compartment Connecting to the storage chamber through a supply duct; a second evaporator disposed inside the freezing chamber; a switching valve for switching whether a refrigerant flows to a refrigerant passage connecting the second evaporator; Having the cooled air in the first evaporator flow from the cooling chamber to the storage compartment; a first air duct opener inserted into the supply air duct connected to the refrigerating compartment; A duct opener that is inserted into the supply duct connected to the freezing compartment.
  • the refrigerator has: a first refrigerant passage sequentially connecting the switching valve, a first adjusting unit, the first evaporator; and a second refrigerant passage, which are sequentially connected The switching valve, the second regulating unit, the second evaporator, and the first evaporator.
  • the switching valve is for connecting a refrigerant passage on a condenser outlet side to the first refrigerant passage or the second refrigerant passage.
  • the refrigerator has a load detecting unit for detecting the storage room refrigeration load, and switching the switching valve when a refrigeration load detected by the load detecting unit is less than a specific value.
  • the refrigerant is caused to flow to the second evaporator, and the freezing chamber is directly cooled.
  • the fan in the direct cooling operation of the freezer compartment, the fan is stopped and the second air duct opener is closed.
  • the fan in the direct cooling operation of the freezer compartment, the fan is stopped, and after the second air duct opener is closed for a given time, the fan is operated again to open The second air duct opener.
  • the present invention has the following beneficial technical effects:
  • a refrigerator comprising: a forced circulation type first evaporator disposed in a cooling chamber; a direct cooling type second evaporator disposed inside the freezing chamber; and a switching valve for switching a refrigerant passage; A duct opener is inserted into the supply duct connected to the refrigerating compartment; and the second duct opener is inserted into the supply duct connected to the freezing compartment.
  • the compressor is operated, and the second evaporator pair can be utilized without operating the fan. Cooling in the freezer.
  • the frosting on the first evaporator can be reduced, and the freezing chamber can be prevented from being excessively dried, so that the frequency of running the defrosting is reduced compared to the conventional forced circulation type refrigerator.
  • the power consumption of the fan can be reduced.
  • the switching valve to cause the refrigerant to flow to the first evaporator, and opening the second duct opener connected to the freezer compartment, the compressor and the fan are operated, and the first evaporator can be used to cool the freezer compartment.
  • the frost can be condensed on the first evaporator, thereby reducing the frost on the second evaporator, so that the number of defrosting of the second evaporator is reduced compared with the conventional direct cooling type refrigerator.
  • it is possible to suppress the increase in the temperature in the freezing chamber while reducing the amount of power consumption by the defrosting, and to maintain the quality of the food stored in the freezing compartment for a long period of time.
  • the cold room can be cooled by the melting heat of the first evaporator, and the cold room can be humidified by the moisture of the frost. In this way, it is possible to suppress the drying of the food in the refrigerating compartment while achieving energy-saving and high-efficiency cooling, thereby maintaining the quality of the food.
  • the refrigeration cycle is provided with: a first refrigerant passage, which is sequentially connected to the switching valve, the first regulating unit, and the first evaporator; and a second refrigerant passage, which is sequentially connected to the switching valve,
  • the second regulating unit, the second evaporator, and the first evaporator can switch the refrigerant passage on the outlet side of the condenser to be connected to one of the first refrigerant passage or the second refrigerant passage through the switching valve.
  • the switching valve By switching the switching valve to the first refrigerant passage, it is possible to cause the refrigerant to flow only to the first evaporator to perform the storage compartment cooling. That is, it is possible to cool the refrigerating compartment and the freezing compartment to a suitable temperature while preventing frosting on the second evaporator.
  • the first evaporator and the second evaporator can be connected in series, thereby utilizing the first direct cooling of the inside of the freezing chamber by the second evaporator, using the first The evaporator cools the circulating air and then dehumidifies it.
  • the first evaporator and the second evaporator while preventing condensation on the second evaporator, and to effectively cool the freezer compartment.
  • the refrigerant flowing out of the second evaporator flows to the first evaporator, so that the remaining liquid refrigerant can be stored in the first evaporator. In this way, it is possible to prevent the liquid refrigerant from flowing back to the compressor, and it is possible to reduce the internal volume of the accumulator or the like.
  • a refrigerator according to the present invention is provided with a load detecting unit for detecting a storage compartment refrigeration load, and when the refrigeration load detected by the load detecting unit is less than a specific value, switching the switching valve to cause the refrigerant to flow to the second evaporation Perform a direct cooling operation in the freezer compartment. In this way, it is possible to achieve efficient cooling of the freezer compartment by the second evaporator while preventing the freezer compartment from drying. In addition, it is possible to minimize frosting on the second evaporator.
  • the refrigerator in the direct cooling operation of the freezer compartment, by stopping the fan and closing the second duct opener, the forced circulation can be stopped, and only the second evaporator is used for the freezing compartment. In this way, more efficient cooling can be achieved while preventing the freezer from drying.
  • the refrigerator provided according to the present invention stops the fan in the direct cooling operation of the freezer compartment, and after a certain time elapses after the second air duct opener is closed, the fan is operated to open the second air duct opener.
  • the direct cooling operation of the freezer compartment air can be forcedly circulated between the freezing compartment and the cooling compartment, so that the frost is condensed on the first evaporator.
  • the frost is condensed on the first evaporator.
  • the moisture recovered by the first evaporator can be utilized in the humidifying operation of the refrigerating compartment.
  • FIG. 1 is a schematic structural view of a refrigerator according to an embodiment of the present invention.
  • FIG. 2 is a block diagram of a refrigerator control system shown in accordance with an embodiment of the present invention.
  • FIG. 3 is a control flow chart showing control of operation of a refrigerator according to an embodiment of the present invention.
  • FIG. 4 is a control flow chart showing control of operation of a refrigerator according to an embodiment of the present invention.
  • FIG. 5 is a control flow chart showing control of operation of a refrigerator according to an embodiment of the present invention.
  • FIG. 6 is a control flow chart showing control of operation of a refrigerator according to an embodiment of the present invention.
  • FIG. 7 is a control flow diagram showing control of operation of a refrigerator, in accordance with an embodiment of the present invention.
  • Fig. 1 is a schematic configuration diagram of a refrigerator 1 shown in accordance with the present embodiment.
  • a side cross-sectional view of the refrigerator 1 overlaps with a thumbnail of the refrigeration cycle 20.
  • the refrigerator 1 is mainly provided with a heat insulating box 2, and a storage compartment for storing food or the like is provided inside the heat insulating box 2.
  • the inside of the storage compartment is divided into two storage compartments having different storage temperatures, that is, the refrigerating compartment 3 in the refrigerating temperature range and the freezing compartment 4 in the freezing temperature domain.
  • the refrigerating compartment 3 is separated from the freezing compartment 4 located in the lower layer by a heat insulating partition wall 7.
  • the inside of the refrigerating compartment 3 and the freezing compartment 4 are provided with a shelf (not shown in the drawing) and a storage container (not shown) for storing foods and the like.
  • the structure of the heat insulating box 2 includes an outer box 2a made of a steel plate and having an opening at the front, and an inner box 2b made of synthetic resin and disposed in the outer box 2a with a gap therebetween.
  • the heat insulating material 2c is made of urethane foam, and is foamed and filled in a space between the outer casing 2a and the inner casing 2b.
  • An opening is provided in front of the heat insulating box 2, and the openings correspond to the refrigerating compartment 3 and the freezing compartment 4, respectively, and the tops 5 and 6 which are freely openable and closable are respectively provided.
  • a storage basket may be provided inside the boxes of the doors 5 and 6.
  • the refrigerator 1 is provided with a door opening and closing sensor 34 for detecting opening and closing of the doors 5, 6.
  • the storage compartment can be divided into finer partitions, for example, other storage compartments such as an ice making compartment and a fruit and vegetable compartment, and a plurality of doors are provided corresponding to the respective storage compartments. Further, a storage container or the like that can be pulled out integrally with each door may be provided in each storage chamber.
  • the rear surface and the top surface of the refrigerating compartment 3 form a supply duct 10 for introducing the air cooled by the first evaporator 22 described later into the interior of the refrigerating compartment 3.
  • the supply duct 10 refers to a space formed between the partition made of synthetic resin and the inner box 2b of the heat insulating box 2 which is formed on the back surface of the refrigerator compartment 3.
  • the partition body is provided with an air outlet for supplying cold air flowing into the supply duct 10 to the inside of the refrigerating compartment 3.
  • the back side of the freezing compartment 4 is provided with a supply duct 9 which is connected to the freezing compartment 4 and the supply duct 10.
  • a partition made of synthetic resin is interposed between the supply duct 9 and the freezing compartment 4.
  • the partition body is provided with an air outlet, from which the cold air flows to the freezing compartment 4, and the air outlet is provided with a freezing damper 12 (hereinafter referred to as "F damper 12") as a second duct opening and closing device.
  • F damper 12 freezing damper 12
  • a refrigerating damper 11 (hereinafter referred to as "R damper 11") as a first duct opening and closing device is provided on the supply duct 10 connected to the refrigerating compartment 3. That is, the supply duct 9 is connected to the supply duct 10 via the R damper 11.
  • the R damper 11 and the F damper 12 are an electric damper which is composed of a plate-like body and a drive motor, and the former is a shaft that can be freely rotated on one side to support the opening and closing cover.
  • the first air duct opener or the second air duct opener is not limited to these, and other types of opening and closing devices such as a sliding type opening and closing plate may be employed.
  • the F damper 12 By opening and closing the F damper 12, it is possible to adjust whether air flows from the supply duct 9 to the freezing compartment 4 or not.
  • the flow rate of the cold air supplied to the freezing compartment 4 can be adjusted by appropriately adjusting the opening and closing operation of the F damper 12.
  • the inside of the heat insulating box 2 is provided with a cooling chamber 8 which is spaced apart from the supply duct 9 by a separator made of synthetic resin.
  • the interior of the cooling chamber 8 is provided with a first evaporator 22 for cooling the air circulating inside the chamber. A detailed description of the first evaporator 22 will be described later.
  • a defrosting heater not shown in the drawing is provided as a defrosting unit for melting and removing the frost on the first evaporator 22. Further, a return port is provided below the cooling chamber 8 for returning air from the freezing chamber 4 to the cooling chamber 8.
  • the fan 13 is an axial fan having a rotatable propeller fan, a fan motor (not shown in the drawings), and a casing having a wind tunnel (not shown in the drawings).
  • the fan 13 may also employ, for example, a combination of a propeller fan and a motor without a bushing, and other types of fans such as a multi-blade fan.
  • a refrigerator compartment temperature sensor 18 (hereinafter referred to as “R sensor 18") is provided inside the refrigerator compartment 3 for detecting the temperature inside the refrigerator compartment 3.
  • a freezer compartment temperature sensor 19 is provided inside the freezing compartment 4 for detecting the temperature inside the freezing compartment 4 (hereinafter referred to as “F sensor 19").
  • the mounting position of the R sensor 18 and the F sensor 19 is not limited to the position shown in FIG.
  • the refrigerator 1 is further provided with an outside temperature sensor 33 for detecting the temperature outside the refrigerator.
  • the refrigerator 1 has a vapor compression refrigeration cycle 20 .
  • the refrigeration cycle 20 includes a compressor 21 for compressing the refrigerant, and a condenser 24 for compressing the high temperature and high pressure refrigerant to exchange heat with the outside air to condense the refrigerant.
  • a heat radiating fan (not shown) for supplying air to the compressor 21 and the condenser 24 and blowing air to the condenser 24 is disposed in a machine room located on the depth side below the refrigerator 1.
  • the refrigerant used in the refrigeration cycle 20 of the refrigerator 1 is isobutane. (R600a).
  • the refrigeration cycle 20 includes a first evaporator 22 disposed inside the cooling chamber 8 for performing forced circulation refrigeration, and a second evaporator 23 disposed inside the freezing chamber 4 for direct cooling Refrigeration.
  • the first evaporator 22 is, for example, a fin-and-tube heat exchanger in which the inside of the heat exchange tube is a refrigerant flow path.
  • the refrigerant flowing through the first evaporator 22 exchanges heat with the air flowing through the cooling chamber 8 and evaporates.
  • the air flowing through the cooling chamber 8 is cooled, and the cooled air is supplied to the refrigerating chamber 3 and the freezing chamber 4.
  • the first evaporator 22 may employ other types of heat exchangers, for example, heat exchangers using flat porous tubes and shaped tubes, and the like.
  • the second evaporator 23 may be a refrigerant flow path inside the heat exchange tube, and various heat exchangers such as a wire for promoting heat transfer and a fin tube may be provided outside the heat exchange tube.
  • the second evaporator 23 may be a so-called pressure-welded plate type heat exchanger in which a pair of steel sheets are bonded together to form a refrigerant flow path between the steel sheets. The refrigerant flowing through the second evaporator 23 exchanges heat with the air in the freezing compartment 4 and evaporates. In this way, the freezing compartment 4 is cooled.
  • the first evaporator 22 and the second evaporator 23 are respectively connected with a first adjusting unit 26 and a second adjusting unit 27 for compressing and expanding the high-pressure liquid refrigerant.
  • the upstream side of the first adjusting unit 26 and the second adjusting unit 27 is provided with a three-way valve 25 as a switching valve for switching the refrigerant passage, and selecting whether to cause the refrigerant to flow into the refrigerant passage connected to the second evaporator 23 (the Two refrigerant channels B).
  • the refrigeration cycle 20 includes a first refrigerant passage A that sequentially connects the three-way valve 25, the first regulator unit 26, the first evaporator 22, and a second refrigerant passage B that is sequentially connected to the three-way valve. 25.
  • the refrigerant passage on the outlet side of the condenser 24 can be connected to one side of the first refrigerant passage A or the second refrigerant passage B.
  • the three-way valve 25 may also close both the first refrigerant passage A and the second refrigerant passage B.
  • the first adjustment unit 26 and the second adjustment unit 27 may employ, for example, a capillary tube and an electronic expansion valve or the like.
  • an electronic expansion valve capable of completely closing the first adjustment unit 26 and the second adjustment unit 27 is employed, one of the first adjustment unit 26 and the second adjustment unit 27 may be selected to be placed in an open state, thereby The three-way valve 25 is omitted. That is, the electronic expansion valve as the first adjustment unit 26 and the second adjustment unit 27 can be utilized as a switching valve for switching the refrigerant passage. Further, an electromagnetic opening and closing valve or the like may be provided on each of the first refrigerant passage A and the second refrigerant passage B as a switching valve instead of the three-way valve 25.
  • FIG. 2 is a block diagram depicting a control system of the refrigerator 1. As shown in FIG. 2, the refrigerator 1 is provided with a control device 30 for controlling each component device.
  • the input side of the control device 30 is connected with an F sensor 19 for detecting the temperature of the freezing compartment 4 (refer to FIG. 1), an R sensor 18 for detecting the temperature of the refrigerating compartment 3 (refer to FIG. 1), and an operation panel 32 for the user.
  • F sensor 19 for detecting the temperature of the freezing compartment 4
  • R sensor 18 for detecting the temperature of the refrigerating compartment 3
  • operation panel 32 for the user.
  • Various set values are input; the outside temperature sensor 33 and the door opening and closing sensor 34.
  • the F sensor 19, the R sensor 18, the outside temperature sensor 33, and the door opening and closing sensor 34 are a type of load detecting unit of the control device 30 for detecting information required to calculate the cooling load. Further, as another load detecting means, the control device 30 also has a function of detecting the load (current, voltage) of the compressor 21.
  • the output side of the control device 30 is connected to an F damper 12, an R damper 11, a compressor 21, a fan 13, and a three-way valve 25.
  • the control device 30 is also connected with sensors and controlled devices not shown in other drawings.
  • the control device 30 performs a designation calculation based on the inputs of the F sensor 19, the R sensor 18, the operation panel 32, the outside temperature sensor 33, the door opening and closing sensor 34, and the like, thereby controlling the F damper 12, the R damper 11, the compressor 21, and the fan. 13 and three-way valve 25 and so on.
  • Fig. 3 is a flow chart for controlling the operation of the refrigerator 1, showing a control flow regarding the selection of the operation mode.
  • the control device 30 (refer to FIG. 2) is in the common high load mode M1, the energy saving mode M2, and the hybrid cooling mode. Select any mode in M3. Specifically, first, the control device 30 determines whether or not the necessary condition (S1) of the usual high load mode M1 is satisfied, and if the necessary condition is satisfied (S1: YES), the usual high load mode M1 is executed. If the necessary condition of the usual high load mode M1 is not satisfied (S1: NO), the control device 30 determines whether or not the energy saving mode M2 is executed (S2), and if the necessary condition of the energy saving mode M2 is satisfied (S2: YES), the energy saving is performed. Mode M2.
  • the control device 30 determines the mixed cooling mode M3 (S3). If the necessary condition is satisfied (S3: YES), the control device 30 selects the mixed cooling mode M3, and if the necessary condition is not satisfied (S3: NO), returns to step S1 and continues to select the operation mode.
  • the cooling load of the refrigerator 1 is employed as a standard for selecting an operation mode. That is, if the cooling load is greater than or equal to the specified standard value (first standard value) (S1: YES), the control device 30 executes the usual high load mode M1. Further, if the cooling load is smaller than the first standard value but greater than or equal to the specified standard value (second standard value) smaller than the first standard value (S2: YES), the control device 30 selects the energy saving mode M2. On the other hand, if the cooling load is smaller than the second standard value (S3: YES), the control device 30 selects the hybrid cooling mode M3.
  • first standard value specified standard value
  • second standard value specified standard value
  • the control device 30 selects the energy saving mode M2.
  • the control device 30 selects the hybrid cooling mode M3.
  • the cooling load value as a reference when the operation mode is selected is based on: the temperature of the refrigerating compartment 3 detected by the R sensor 18 shown in Fig. 1 or Fig. 2; the temperature of the freezing compartment 4 detected by the F sensor 19; and the temperature sensor outside the tank The detected outside temperature of the door; the opening and closing state of the doors 5 and 6 detected by the door opening and closing sensor 34; the load of the compressor 21; various setting values input through the operation panel 32, etc. . Further, the timer 31 of the control device 30, the learning function, and the like may be used to store the state of change of the cooling load, and the calculation of the predicted cooling load may be performed.
  • Fig. 4 is a flow chart for controlling the operation of the refrigerator 1, showing the control flow regarding the usual high load mode M1.
  • the cooled air in the first evaporator 22 shown in Fig. 1 is forcibly circulated to cool the refrigerating compartment 3 and the freezing compartment 4.
  • the F damper 12 is always opened, and the R damper 11 is opened and closed according to the temperature of the refrigerating compartment 3.
  • the control device 30 determines whether or not the cooling operation is performed by comparing the temperature in the freezing compartment 4 detected by the F sensor 19 with the specified set temperature TF (S10). .
  • the set temperature TF is a standard temperature for determining whether to start or end the refrigeration of the freezing compartment 4.
  • the set temperature TF term may be input as the designated set value F to be the standard for starting the freezing of the freezer compartment 4, or the predetermined set value F is input as the standard for ending the freezing of the freezer compartment 4.
  • the set value F is on and the set value F is a standard temperature determined according to the cooling load state and various setting values input through the operation panel 32 (refer to FIG. 2), and the value of the set value F is larger than the set value. F off.
  • the set value F is turned on and the set value F is turned off, which avoids frequent switching between the start of cooling and the stop of cooling, and achieves stable control.
  • step S10 if the temperature of the freezing compartment 4 is higher than the set temperature TF (S10: YES), the control device 30 inputs the set value F at the set temperature TF, and operates the compressor 21 and the fan 13, and the tee is turned The valve 25 is switched to the first refrigerant passage A, and the F damper 12 is opened (S11).
  • the refrigerant compressed by the compressor 21 into a high temperature and high pressure is exothermicly condensed in the condenser 24 (refer to FIG. 1), and then decompressed by the first regulating unit 26 (refer to FIG. 1), then compressed and expanded, and flows into the first Evaporator 22.
  • the first evaporator 22 the low-temperature liquid refrigerant evaporates, and the air in the cooling chamber 8 is cooled by heat exchange with the refrigerant. Thereafter, the cooled air is sent out by the blower 13 and supplied to the freezing compartment 4. Further, in step S11, by inputting the set value F off at the set temperature TF, it is possible to avoid the end of the cooling operation immediately after the compressor 21 and the fan 13 are operated.
  • control device 30 determines whether or not the refrigerator compartment 3 is to be cooled by comparing the temperature in the refrigerator compartment 3 detected by the R sensor 18 with the predetermined set temperature TR (S12).
  • the set temperature TR is a standard temperature for determining whether to start or end the refrigeration of the refrigerating compartment 3.
  • the set temperature value TR can be input as the standard for starting the refrigeration of the refrigerating compartment 3 or by inputting the designated set value R as the standard for ending the refrigerating compartment 3 cooling.
  • the set value R ON and the set value R are the standard temperatures determined according to the state of the cooling load and various setting values input through the operation panel 32, and the set value R is turned on more than the set value R.
  • the set value R is turned on and the set value R is set to set a certain value difference between the standard for starting the cooling and the standard for ending the cooling to avoid frequent repeated operation. Stop the action.
  • step S12 if the temperature of the refrigerating compartment 3 is higher than the set temperature TR (S12: YES), the control device 30 opens the R damper 11 and inputs the set value R to the set temperature TR term (S13). After the R damper 11 is opened, the cooled air in the first evaporator 22 flows into the refrigerating compartment 3, and the refrigerating compartment 3 is cooled. Further, when the set value R is input at the set temperature TR, the cooling of the refrigerating compartment 3 after the R damper 11 is opened can be prevented from being immediately ended, thereby preventing the R damper 11 from repeatedly repeating the opening and closing operation.
  • step S12 if the temperature of the refrigerating compartment 3 is lower than or equal to the set temperature TR (S12: NO), the control device 30 turns off the R damper 11, and inputs the set value R at the set temperature TR item. (S15). In this way, the supply of cold air to the refrigerating compartment is cut off. Further, the set temperature TR is set to be the standard temperature at which the cooling of the refrigerating compartment 3 is started, that is, the set value R is turned on.
  • step S10 if the temperature of the freezing compartment 4 is lower than or equal to the set temperature TF (S10: NO), the control device 30 inputs the set value F at the set temperature TF, and stops the compressor 21 and the fan. 13, the three-way valve 25 is closed, and the F-damper 12 is closed (S14). As a result, the cooling work will stop.
  • Fig. 5 is a flow chart for controlling the operation of the refrigerator 1, showing the control flow regarding the energy saving mode M2.
  • the cooled air in the first evaporator 22 shown in FIG. 1 is forcibly circulated to cool the refrigerating compartment 3 and the freezing compartment 4, and the R damper 11 and the F damper 12 are respectively cooled according to the refrigerating compartment 3 and The temperature of the chamber 4 is controlled to open and close.
  • the control device 30 (refer to FIG. 2) operates the compressor 21 and the blower 13, and switches the three-way valve 25 to the first refrigerant passage A (S20). In this way, the forced circulation refrigeration will be performed by the first evaporator 22.
  • the control device 30 determines whether or not the freezer compartment 4 is to be cooled by comparing the temperature in the freezer compartment 4 detected by the F sensor 19 with the set temperature TF (S21). If the temperature of the freezing compartment 4 is higher than the set temperature TF (S21: YES), the control device 30 opens the F damper 12 and inputs the set value F off at the set temperature TF. In this way, the cooled air in the first evaporator 22 will be supplied to the freezing compartment 4.
  • step S21 if the temperature of the freezing compartment 4 is lower than or equal to the set temperature TF (S21: NO), the control device 30 turns off the F damper 12, and inputs the set value F at the set temperature TF item ( S25). When the F damper 12 is closed, the refrigeration of the freezing compartment 4 is stopped.
  • the control device 30 determines the cumulative time during which the F-valve 12 is maintained in the open state (S23). Then, the control device 30 determines whether or not the accumulated time in which the F-valve 12 is maintained in the open state exceeds the F maximum cooling time (hereinafter referred to as "time Fmax") which is the designated upper limit value in which the F-valve 12 is maintained in the open state (S24).
  • time Fmax the F maximum cooling time
  • the control device 30 When the accumulated time in which the F damper 12 is maintained in the open state exceeds the time Fmax (S24: YES), the control device 30 turns off the F damper 12, and inputs the set value F at the set temperature TF (S25). After the F damper 12 is closed, the supply of cold air to the freezing compartment 4 will be stopped. In other words, when the accumulated time in which the F damper 12 is maintained in the open state exceeds the time Fmax, the control device 30 directly stops the freezing of the freezing compartment 4 regardless of the temperature of the freezing compartment 4, and switches to the next cooling operation.
  • step S1 when the accumulated time in which the F damper 12 is maintained in the open state does not exceed the time Fmax (S24: NO), the control device 30 returns to step S1 (refer to FIG. 3), and repeats the above-described control operation. That is, if the cooling load is equal (FIG. 3, S2: Yes), the temperature of the freezing compartment 4 is higher than the set temperature TF (S21: YES), and the freezing compartment 4 is continuously cooled by the forced circulation.
  • the control device 30 determines whether or not the refrigerating compartment 3 is to be cooled by comparing the temperature in the refrigerating compartment 3 detected by the R sensor 18 with the set temperature TR (S26). If the temperature of the refrigerating compartment 3 is higher than the set temperature TR (S26: YES), the control device 30 opens the R damper 11 and inputs the set value R at the set temperature TR item (S27). After the R damper 11 is opened, the air cooled in the first evaporator 22 flows into the refrigerating compartment 3, and the refrigerating compartment 3 is cooled.
  • control device 30 measures the cumulative time during which the R damper 11 is maintained in the open state (S28), and further determines whether the accumulated time exceeds the R maximum cooling time (hereinafter referred to as "time" at which the R upper limit of the damper 11 is maintained in the open state. Rmax”) (S29).
  • the control device 30 closes the R damper 11 (S30), maintains the accumulated time in which the R damper 11 is kept open, and maintains the F damper 12 in an open state. After the accumulated time is reset (S31), Returning to step S22, the F damper 12 is opened.
  • the control device 30 directly stops the cooling of the refrigerating compartment 3 regardless of the temperature of the refrigerating compartment 3, and switches to the freezing compartment 4 to perform cooling. In this way, the air cooled in the first evaporator 22 is alternately supplied to the refrigerating compartment 3 and the freezing compartment 4 in accordance with the designated time (time Fmax, time Rmax) by switching.
  • step S29 when the cumulative time in which the R damper 11 is maintained in the open state does not exceed the time Rmax (S29: NO), the control device 30 returns to the step S1, repeats the above-described control operation, and continues the refrigerating by the forced circulation. Room 3 performs refrigeration.
  • step S26 if the temperature of the refrigerating compartment 3 is lower than or equal to the set temperature TR (S26: NO), the control device 30 turns off the R damper 11, and inputs the set value R at the set temperature TR item (S32). In this way, the supply of cold air to the refrigerating compartment 3 will be cut off.
  • control device 30 compares the temperature in the freezing compartment 4 detected by the F sensor 19 with the set temperature TF (S33), and if the temperature of the freezing compartment 4 is higher than the set temperature TF (S33: YES), returns to In step S1, the above control action is repeated.
  • the control device 30 stops the compressor 21 and the blower 13, and closes the three-way valve 25. As a result, the cooling work will stop. Then, the control device 30 returns to the operation of step S1.
  • 6 and 7 are flowcharts for controlling the operation of the refrigerator 1, and show a control flow regarding the hybrid cooling mode M3.
  • forced circulation type cooling using the first evaporator 22 shown in Fig. 1 and direct cooling type cooling (freezer compartment direct cooling operation) using the second evaporator 23 are performed. That is, the refrigerating compartment 3 and the freezing compartment 4 are cooled by the first evaporator 22, and the freezing compartment 4 is cooled by the second evaporator 23.
  • the control device 30 operates the compressor 21 (S40), compares the temperature in the freezing compartment 4 detected by the F sensor 19 with the set temperature TF, and determines whether or not The freezing compartment 4 is to be cooled (S41).
  • the control device 30 switches the three-way valve 25 to the second refrigerant passage B, and inputs the set value F at the set temperature TF (S42). ).
  • the three-way valve 25 is switched to the second refrigerant passage B, and the refrigerant discharged from the condenser 24 (refer to FIG. 1) is depressurized by the second regulating unit 27 (refer to FIG. 1), and then flows into the second evaporator 23. In this way, the freezing chamber 4 is cooled by the second evaporator 23.
  • the refrigerant from the second evaporator 23 flows into the first evaporator 22, so that the remaining liquid refrigerant can be stored in the first evaporator 22. In this way, it is possible to prevent the liquid refrigerant from flowing back to the compressor 21.
  • control device 30 measures the time elapsed after the F-valve 12 is switched (S43), and further determines whether the time elapsed after the F-gate 12 is switched exceeds the specified standard value, that is, the time interval for switching the F-damper (hereinafter referred to as "time” t") (S44).
  • the control device 30 determines the opening and closing state of the F-damper 12 (S45), if the F-damper 12 is in the closed state (S45: Yes) Then, after the time elapsed after switching the F-damper 12 is reset, the fan 13 is operated at a low rotation speed, and the F-damper 12 is opened (S46).
  • the air of the freezing compartment 4 can be circulated to the cooling chamber 8 (refer to FIG. 1), so that the first evaporator 22 can be used for cooling.
  • the frost can be condensed on the first evaporator 22, thereby reducing the frost on the second evaporator 23.
  • the moisture recovered by the first evaporator 22 can be utilized for the humidifying operation of the refrigerating compartment 3.
  • step S45 when the F-damper 12 is in the open state (S45: NO), the control device 30 resets the time elapsed after switching the F-damper 12, stops the fan 13, and closes the F-damper 12 (S49). ). In this way, the freezing of the freezing compartment 4 by the first evaporator 22 is stopped, and the freezing compartment 4 is cooled only by the direct cooling refrigeration of the second evaporator 23. In this way, it is possible to achieve effective cooling while preventing excessive frosting on the first evaporator 22 and drying of the freezing compartment 4.
  • step S44 if the time elapsed after the F-valve 12 is switched has not reached the standard time t (S44: NO), the control device 30 maintains the opening and closing state of the F-damper 12 and the operating state of the blower 13.
  • the opening and closing of the F-damper 12 and the operation/stop operation of the blower 13 can be repeated according to the specified time t, thereby preventing the freezing compartment 4 from drying and reducing.
  • the first evaporator 22 and the second evaporator 23 are frosted to achieve energy saving.
  • step S47 measures the cumulative time during which the F-valve 12 is maintained in the open state, and further determines whether or not the accumulated time exceeds the time Fmax (S48).
  • the control device 30 returns to step S1 (refer to FIG. 3), and repeats the above-described control operation. That is, if the refrigeration load is equal (Fig. 3, S3: YES), the temperature of the freezing compartment 4 is higher than the set temperature TF (S41: YES), the direct cooling operation of the freezer compartment by the second evaporator 23 is continued.
  • step S48 when the accumulated time in which the F-valve 12 is maintained in the open state exceeds the time Fmax (S48: YES), or in step S41, the temperature of the freezing compartment 4 is lower than or equal to the set temperature TF (S41: No)
  • the control device 30 closes the F damper 12 as shown in FIG. 7, the three-way valve 25 is switched to the first refrigerant passage A. In this way, the supply of cold air to the freezing compartment 4 is stopped, while the direct cooling operation of the freezing compartment using the second evaporator 23 is stopped.
  • control device 30 inputs the set value F at the set temperature TF (S51), compares the temperature in the refrigerator compartment 3 detected by the R sensor 18 with the set temperature TR, and determines whether or not the refrigerator compartment 3 is to be cooled. (S52).
  • the control device 30 opens the R damper 11, operates the blower 13, and inputs the set value R at the set temperature TR (S53). As a result, the air cooled in the first evaporator 22 flows into the refrigerating chamber 3, and the refrigerating chamber 3 is cooled.
  • the control device 30 measures the cumulative time during which the R damper 11 is maintained in the open state (S54), and further determines whether or not the accumulated time exceeds the time Rmax (S55). When the accumulated time in which the R damper 11 is maintained in the open state exceeds the time Rmax (S55: YES), the control device 30 closes the R damper 11 (S56), and the cumulative time during which the R damper 11 is maintained in the open state and the accumulation of the F damper 12 in the open state are maintained. After the time and the time elapsed after switching the F-damper 12 is reset (S57), as shown in FIG. 6, the process returns to step 42, and the three-way valve 25 is switched to the second refrigerant passage B.
  • the switching is performed according to the designated time (time Fmax, time Rmax), and the forced circulation refrigeration of the refrigerating compartment 3 using the first evaporator 22 and the direct cooling of the freezing compartment 4 using the second evaporator 23 are alternately performed. .
  • step S55 when the cumulative time in which the R damper 11 is maintained in the open state does not exceed the time Rmax (S55: NO), the control device 30 returns to step S1 (refer to FIG. 3) and repeats In the above control operation, the refrigerating compartment 3 is continuously cooled by the forced circulation.
  • step S52 if the temperature of the refrigerating compartment 3 is lower than or equal to the set temperature TR (S52: NO), the control device 30 turns off the R damper 11, stops the fan 13, and inputs the set value at the set temperature TR item. R is on (S58). In this way, the supply of cold air to the refrigerating compartment 3 will be cut off.
  • control device 30 compares the temperature in the freezing compartment 4 detected by the F sensor 19 with the set temperature TF (S59), and if the temperature of the freezing compartment 4 is higher than the set temperature TF (S59: YES), returns to In step S1, the above control action is repeated.
  • the control device 30 stops the compressor 21 and closes the three-way valve 25. As a result, the cooling work will stop. Then, the control device 30 returns to the operation of step S1.
  • the refrigerator 1 it is possible to combine the forced circulation type cooling using the first evaporator 22 and the direct cooling type cooling using the second evaporator 23, thereby reducing the number of defrosting and further reducing the amount of power consumption. Further, it is possible to prevent the temperature change from being minimized while preventing the refrigerator compartment 3 and the freezing compartment 4 from being dried, so as to prevent deterioration of the quality of foods and the like stored in the storage compartment.
  • the compressor 21 is operated to cool the refrigerating compartment 3, and here, in a state where the compressor 21 is stopped, the fan 13 can be operated to open the R buffer 11, and the first evaporator can be utilized.
  • the cooling heat of the frosting chamber 3 is achieved by the heat of melting of the frost on the 22nd. In this way, it is possible to reduce the amount of power consumption by cooling and the amount of power consumed by defrosting, and to achieve better energy saving.
  • the inside of the refrigerating compartment 3 can be humidified by the moisture of the frost, thereby preventing the food in the refrigerating compartment 3 from drying and maintaining its quality.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

Ce réfrigérateur comprend : un compartiment de stockage, au moins divisé en un compartiment de réfrigération (3) et un compartiment de congélation (4); un premier évaporateur (22), disposé dans une chambre de refroidissement (8) reliée au compartiment de stockage (3, 4) au moyen d'un conduit d'alimentation (9, 10); un second évaporateur (23) disposé à l'intérieur du compartiment de congélation (4); une soupape de commutation (25), utilisée pour commuter un fluide frigorigène à s'écouler ou non vers un passage de fluide frigorigène relié au second évaporateur (23); un ventilateur (13), utilisé pour faire circuler l'air refroidi par le premier évaporateur (22) depuis la chambre de refroidissement (8) vers le compartiment de stockage (3, 4); un premier obturateur de conduit (11), inséré dans le conduit d'alimentation (9) relié au compartiment de réfrigération (3); et un second obturateur de conduit (12), inséré dans le conduit d'alimentation (9) relié au compartiment de congélation (4). Le réfrigérateur peut empêcher le compartiment de stockage (3, 4) de devenir sec, réduisant ainsi les situations de dégivrage et la consommation d'énergie.
PCT/CN2017/074590 2016-10-24 2017-02-23 Réfrigérateur WO2018076584A1 (fr)

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EP3531048A4 (fr) 2019-09-18
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